Gravitational waves and the polarisation of the Cosmic Microwave Background

Frewin, Richard Arthur, Polnarev, A. G. and Coles, P. 2011. Gravitational waves and the polarisation of the Cosmic Microwave Background. Monthly notices of the Royal Astronomical Society

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Abstract

We discuss the influence of gravitational waves (GWs) upon the polarisation of the Cosmic Microwave Background Radiation (CMBR). We show how to compute the em rms temperature anisotropy and polarisation of the CMBR induced by GWs of arbitrary wavelength. We find that the ratio of polarisation, Pi, to anisotropy, A, can be as large as sim 40%, but is sensitively dependent upon the GW spectrum and the cosmological ionisation history. We argue that CMBR polarisation measurements can provide useful constraints on cosmological models.

Item Type:	Article
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QB Astronomy
Uncontrolled Keywords:	Radiation mechanisms: gravitational; cosmic microwave background; cosmology: theory; early Universe.
Additional Information:	Originally published in 1994 in Mon.Not.Roy.Astron.Soc. 266 (1994) L21
Related URLs:	http://arxiv.org/abs/astro-ph/9310045
Last Modified:	06 May 2023 03:47
URI:	https://orca.cardiff.ac.uk/id/eprint/6950

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